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-rw-r--r--include/asm-generic/memory_model.h13
1 files changed, 13 insertions, 0 deletions
diff --git a/include/asm-generic/memory_model.h b/include/asm-generic/memory_model.h
index 6796abe1900e..6d1fb6162ac1 100644
--- a/include/asm-generic/memory_model.h
+++ b/include/asm-generic/memory_model.h
@@ -64,6 +64,19 @@ static inline int pfn_valid(unsigned long pfn)
#define page_to_pfn __page_to_pfn
#define pfn_to_page __pfn_to_page
+#ifdef CONFIG_DEBUG_VIRTUAL
+#define page_to_phys(page) \
+({ \
+ unsigned long __pfn = page_to_pfn(page); \
+ \
+ WARN_ON_ONCE(!pfn_valid(__pfn)); \
+ PFN_PHYS(__pfn); \
+})
+#else
+#define page_to_phys(page) PFN_PHYS(page_to_pfn(page))
+#endif /* CONFIG_DEBUG_VIRTUAL */
+#define phys_to_page(phys) pfn_to_page(PHYS_PFN(phys))
+
#endif /* __ASSEMBLY__ */
#endif